[polly] r247020 - Add first run-time bounds elimination test case

[Tobias Grosser via llvm-commits]

Author: grosser
Date: Tue Sep  8 11:02:19 2015
New Revision: 247020

URL: http://llvm.org/viewvc/llvm-project?rev=247020&view=rev
Log:
Add first run-time bounds elimination test case

Added:
    polly/trunk/test/ScopInfo/BoundChecks/
    polly/trunk/test/ScopInfo/BoundChecks/single-loop.ll

Added: polly/trunk/test/ScopInfo/BoundChecks/single-loop.ll
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/test/ScopInfo/BoundChecks/single-loop.ll?rev=247020&view=auto
==============================================================================
--- polly/trunk/test/ScopInfo/BoundChecks/single-loop.ll (added)
+++ polly/trunk/test/ScopInfo/BoundChecks/single-loop.ll Tue Sep  8 11:02:19 2015
@@ -0,0 +1,75 @@
+; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
+; XFAIL: *
+;
+;    void exception() __attribute__((noreturn));
+;
+;    void foo(long n, float A[100]) {
+;      for (long i = 0; i < n; i++) {
+;        if (i < 0)
+;          exception();
+;
+;        if (i >= 100)
+;          exception();
+;
+;        A[i] += i;
+;      }
+;    }
+
+; We should detect this kernel as a SCoP and derive run-time conditions such
+; that the bound-checked blocks are not part of the optimized SCoP.
+
+; CHECK: Assumed Context
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+
+; Function Attrs: nounwind uwtable
+define void @foo(i64 %n, float* %A) #0 {
+entry:
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.inc, %entry
+  %i.0 = phi i64 [ 0, %entry ], [ %inc, %for.inc ]
+  %cmp = icmp slt i64 %i.0, %n
+  br i1 %cmp, label %for.body, label %for.end
+
+for.body:                                         ; preds = %for.cond
+  br i1 false, label %if.then, label %if.end
+
+if.then:                                          ; preds = %for.body
+  call void (...) @exception() #2
+  unreachable
+
+if.end:                                           ; preds = %for.body
+  %cmp2 = icmp sgt i64 %i.0, 99
+  br i1 %cmp2, label %if.then.3, label %if.end.4
+
+if.then.3:                                        ; preds = %if.end
+  call void (...) @exception() #2
+  unreachable
+
+if.end.4:                                         ; preds = %if.end
+  %conv = sitofp i64 %i.0 to float
+  %arrayidx = getelementptr inbounds float, float* %A, i64 %i.0
+  %tmp = load float, float* %arrayidx, align 4
+  %add = fadd float %tmp, %conv
+  store float %add, float* %arrayidx, align 4
+  br label %for.inc
+
+for.inc:                                          ; preds = %if.end.4
+  %inc = add nuw nsw i64 %i.0, 1
+  br label %for.cond
+
+for.end:                                          ; preds = %for.cond
+  ret void
+}
+
+; Function Attrs: noreturn
+declare void @exception(...) #1
+
+attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { noreturn "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { noreturn nounwind }
+
+!llvm.ident = !{!0}
+
+!0 = !{!"clang version 3.8.0 (trunk 246853)"}